<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>标签的演示</title>
</head>
<body>
<form action="#" method="get" autocomplete="off">
    用户名:<input type="text" name="username">
    <button type="submit">提交</button>

<!--post 在网页上不显示输入-->
    <form action="#" method="post" autocomplete="off'"></form>
    用户名<input type="text" name="username"/>
    <button type="submit">提交</button>
</form>
</body>
</html>